Vulnerabilities CVE-2026-15788

CVE-2026-15788

Medium

Open

TLP:CLEAR

WCOW cache mount source selector resolves NTFS junctions outside of cache root

NVD CVE.org

Critical Infrastructure

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Description

BuildKit's cache mount source= selector on Windows Container on Windows (WCOW) workers does not detect NTFS directory junctions placed inside the cache root. A build authored by an untrusted user on a WCOW-configured BuildKit daemon can read arbitrary host files reachable to the BuildKit daemon process.

Details

CVSS Score: 5.6
EPSS Score ⓘ: 0.27%

19.6th percentile
CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Confidence: 90%
Published: Jul 20, 2026
Last Modified: Jul 20, 2026

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